package com.ql.dev.customwebview.library.views;

import com.ql.dev.customwebview.library.utils.StringUtils;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * 可以去除HTML 标签
 * Created by Quanguanzhou on  2017/7/6 0006.
 * Copyright (c) 2015, quanguanzhou83@gmail.com All Rights Reserved.
 */
public class GlobalHtmlInfo {
    /**
     * 定义script的正则表达式
     */
    private static final String REGEX_SCRIPT = "<script[^>]*?>[\\s\\S]*?<\\/script>";
    /**
     * 定义style的正则表达式
     */
    private static final String REGEX_STYLE = "<style[^>]*?>[\\s\\S]*?<\\/style>";
    /**
     * 定义HTML标签的正则表达式
     */
    private static final String REGEX_HTML = "<[^>]+>";
    /**
     * 定义空格回车换行符
     */
    private static final String REGEX_SPACE = "\\s*|\t|\r|\n";

    public static String delHTMLTag(String htmlStr) {
        if(!StringUtils.isEmpty(htmlStr)) {
            // 过滤script标签
            Pattern p_script = Pattern.compile(REGEX_SCRIPT, Pattern.CASE_INSENSITIVE);
            Matcher m_script = p_script.matcher(htmlStr);
            htmlStr = m_script.replaceAll("");
            // 过滤style标签
            Pattern p_style = Pattern.compile(REGEX_STYLE, Pattern.CASE_INSENSITIVE);
            Matcher m_style = p_style.matcher(htmlStr);
            htmlStr = m_style.replaceAll("");
            // 过滤html标签
            Pattern p_html = Pattern.compile(REGEX_HTML, Pattern.CASE_INSENSITIVE);
            Matcher m_html = p_html.matcher(htmlStr);
            htmlStr = m_html.replaceAll("");
            // 过滤空格回车标签
            Pattern p_space = Pattern.compile(REGEX_SPACE, Pattern.CASE_INSENSITIVE);
            Matcher m_space = p_space.matcher(htmlStr);
            htmlStr = m_space.replaceAll("");
            return htmlStr.trim(); // 返回文本字符串
        }else{
            return htmlStr;
        }
    }
}
